Air tube for pneumatic tires



' vn; 1. CHAPPELL. MR TUBE FOR FNEUMATIC TIRES.

APPLICATION FILED MAYH. 1922.

D. J. CHAPPELL. AQRTUBE FOR PNEUMATIC TIRES. APPLICATION man MAYH.1922.

Patented Oct. 3, 1922.

2 SHEETS-SHEET 2.

25W /f/W @i Patented @et it,

ont) tutti at? ly i :DAVID JOHN CHATPPELL, 03:'l LLANELLY, WALES.

AIR TUBE FOR PNEUMATIC TIRES.

Application filed May 11,

To all wlw/nt 'it may concern.

Be it known that I. Devin loi-ii: Crt/rrrnLL, a subject of the King oi'Great Britain and Ireland, of College Hill, Llanelly, South lllales,Great Britainy have invented new and Improved Air rltube 'for PneumaticTires (tor which l have tiled application tor patent in Great Britainllo. i'flt, liled llt-h January 192i), ot 'which the tollowing is aspecification.

This iirfention relates to in'iprovements in pneumatic tubes itorautomobile tires the object ot' the invention beine' to etlectimprovements in the construction ot the tube whereby the same will beprevented from becoming' deflated in the event oli a puncture.

lVith the above and other objedf; in view.r the invention consists inthe conr-ltruction7 combination and arrangement ot the devices ashereinafter described and claimed.

In order to enable my present invention to be tully understoodreliereiufe will be made to the aceompanying drawings illustratingthesaine.

Figure l is a plan and Figure 2 is a seetion (on line Xm-X) ot a portionoitl the length of one of the strips.

Figure 3 is a plan and Figure et is a section (on line Y-Y) ot a portionof the length of a number of the strips when laid properly in positionoverlapping one another.

Figure 5 is a perspective view olf a broken piece of air tube, showin; apart of its inside surface covered with the strips properly arranged asin Figure 3.

Figure G is a plan (similar to Figure l) ot a modified form of strip.

Fig. 7 is a sectional perspective view olf the same.

Referring to Figures l to 5, not only is each strip Z) slitted at o1 toproduce flaps o2, but in keeping with my present invention. tongues care provided upon the flaps o2 for covering the slits b1 in the stripwhich 1922. Serial No. tlll.

is underneath. Fach slit 1 is therefore completely covered by a tonguewhich is tree at one end, belongingto the next strip o, above, and thereis, or there should be prete n.lily, no slit throughout the ivholeprotective surface lett uncof'ered by one oit' the tongues e. llV hentherefore a nail (l (Figure happens to puncture the air tube (t at apoint opposite one oi? the innumerable slits o1, it will. simply li'itup the tongue c Coveringl that slit without puncturiniI the tongue, andthe tongue will seal the puncture when the nail nl is withdrawn.

The tree ends or the tongue c may project beyond the open ends or theslits olif this should be t'ound to be any advantage. Moreover tongues emay be either ot the same length as the slits o1v or shorter or longer,according' to Wish. The slits o1 maybe Atermed of any Width, either asshown in Figure 6, or or any greater Tidth not larger than the `Width orthe tongues o which are intended to cover them. i

illy invention is not conlined to rectangular forms such as illustrated7as the tongues and slits or gaps may be formed in any other suitableshape. ln any particular case where it may be 'found desirable, thestrips. that is the tlaps and tongues, may be treated with glycerine orany other serviceable medium to render them taeky, sticky or other- Wisemore air proof along the surfaces or edges which are normally` inContact .vith one another.

claim:

An improved air tube for pneumatic tires of the kind having strips or'thin rubber or equivalent material fastened along one edge to its innersurface such strips overlapping' eaeh other and each strip out intoflaps, characterized by the flaps eaeh having a tongue or extensionsufficiently long;` and Wide to cover completely the slits or gaps inthe next strip below.

DAY/vll) JOHN CHAPPELL.

